Maximizing Go's Capabilities with the WebAssembly System Interface

21st March 2024

Rajiv Ranjan Singh

Achille Roussel

Agenda

2

Speaker - Rajiv Ranjan Singh

github.com/iamrajiv

3

Speaker - Achille Roussel

github.com/achille-roussel

4

An open-source community journey

5

WebAssembly Architectures

6

The WebAssembly System Interface (WASI)

wasi.dev

7

Why is WASI important?

8

What is Go?

9

An example Go program

package main

import "fmt"

func main() {
    fmt.Println("Hello wasip1!")
}
10

Go is more than a language

The go program is the entrypoint to the Go toolchain. It standardizes how developers build and maintain their applications.

$ go build

$ go mod

$ go fmt

$ go test

$ go tool pprof
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Go is also an ecosystem

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History of WASI Support in the Go Toolchain

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Task #1: Learn the Craft

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Task #2: Power Through

15

Task #3: Deliver the Product

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Task #4: Celebrate

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Using the go:wasmimport directive

package main

import "unsafe"

//go:wasmimport env fasthash
func fasthash(p unsafe.Pointer, n int32) uint64
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Building Go program for wasip1

Simple two step process:

package main

import "fmt"

func main() {
    fmt.Println("Hello wasip1!")
}

$ GOARCH=wasm GOOS=wasip1 go build -o main.wasm main.go
$ wazero run main.wasm
Hello wasip1!
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Making Go plugins with wasip1

20

Kube Scheduler Wasm Extension

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Go wasip1 in a nutshell

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When to use Go vs TinyGo when targetting WASI?

23

The future of WASI in Go

Three main workstreams:

24

Thank you

Rajiv Ranjan Singh

Achille Roussel

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